mirror of
https://github.com/bytedance/deer-flow.git
synced 2026-04-25 11:18:22 +00:00
a664d2f5c4
* fix(checkpointer): create parent directory before opening SQLite in sync provider
The sync checkpointer factory (_sync_checkpointer_cm) opens a SQLite
connection without first ensuring the parent directory exists. The async
provider and both store providers already call ensure_sqlite_parent_dir(),
but this call was missing from the sync path.
When the deer-flow harness package is used from an external virtualenv
(where the .deer-flow directory is not pre-created), the missing parent
directory causes:
sqlite3.OperationalError: unable to open database file
Add the missing ensure_sqlite_parent_dir() call in the sync SQLite
branch, consistent with the async provider, and add a regression test.
Closes #2259
* style: fix ruff format + add call-order assertion for ensure_parent_dir
- Fix formatting in test_checkpointer.py (ruff format)
- Add test_sqlite_ensure_parent_dir_before_connect to verify
ensure_sqlite_parent_dir is called before from_conn_string
(addresses Copilot review suggestion)
---------
Co-authored-by: voidborne-d <voidborne-d@users.noreply.github.com>
378 lines
15 KiB
Python
378 lines
15 KiB
Python
"""Unit tests for checkpointer config and singleton factory."""
|
|
|
|
import sys
|
|
from unittest.mock import AsyncMock, MagicMock, patch
|
|
|
|
import pytest
|
|
|
|
import deerflow.config.app_config as app_config_module
|
|
from deerflow.agents.checkpointer import get_checkpointer, reset_checkpointer
|
|
from deerflow.config.checkpointer_config import (
|
|
CheckpointerConfig,
|
|
get_checkpointer_config,
|
|
load_checkpointer_config_from_dict,
|
|
set_checkpointer_config,
|
|
)
|
|
|
|
|
|
@pytest.fixture(autouse=True)
|
|
def reset_state():
|
|
"""Reset singleton state before each test."""
|
|
app_config_module._app_config = None
|
|
set_checkpointer_config(None)
|
|
reset_checkpointer()
|
|
yield
|
|
app_config_module._app_config = None
|
|
set_checkpointer_config(None)
|
|
reset_checkpointer()
|
|
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Config tests
|
|
# ---------------------------------------------------------------------------
|
|
|
|
|
|
class TestCheckpointerConfig:
|
|
def test_load_memory_config(self):
|
|
load_checkpointer_config_from_dict({"type": "memory"})
|
|
config = get_checkpointer_config()
|
|
assert config is not None
|
|
assert config.type == "memory"
|
|
assert config.connection_string is None
|
|
|
|
def test_load_sqlite_config(self):
|
|
load_checkpointer_config_from_dict({"type": "sqlite", "connection_string": "/tmp/test.db"})
|
|
config = get_checkpointer_config()
|
|
assert config is not None
|
|
assert config.type == "sqlite"
|
|
assert config.connection_string == "/tmp/test.db"
|
|
|
|
def test_load_postgres_config(self):
|
|
load_checkpointer_config_from_dict({"type": "postgres", "connection_string": "postgresql://localhost/db"})
|
|
config = get_checkpointer_config()
|
|
assert config is not None
|
|
assert config.type == "postgres"
|
|
assert config.connection_string == "postgresql://localhost/db"
|
|
|
|
def test_default_connection_string_is_none(self):
|
|
config = CheckpointerConfig(type="memory")
|
|
assert config.connection_string is None
|
|
|
|
def test_set_config_to_none(self):
|
|
load_checkpointer_config_from_dict({"type": "memory"})
|
|
set_checkpointer_config(None)
|
|
assert get_checkpointer_config() is None
|
|
|
|
def test_invalid_type_raises(self):
|
|
with pytest.raises(Exception):
|
|
load_checkpointer_config_from_dict({"type": "unknown"})
|
|
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Factory tests
|
|
# ---------------------------------------------------------------------------
|
|
|
|
|
|
class TestGetCheckpointer:
|
|
def test_returns_in_memory_saver_when_not_configured(self):
|
|
"""get_checkpointer should return InMemorySaver when not configured."""
|
|
from langgraph.checkpoint.memory import InMemorySaver
|
|
|
|
with patch("deerflow.agents.checkpointer.provider.get_app_config", side_effect=FileNotFoundError):
|
|
cp = get_checkpointer()
|
|
assert cp is not None
|
|
assert isinstance(cp, InMemorySaver)
|
|
|
|
def test_memory_returns_in_memory_saver(self):
|
|
load_checkpointer_config_from_dict({"type": "memory"})
|
|
from langgraph.checkpoint.memory import InMemorySaver
|
|
|
|
cp = get_checkpointer()
|
|
assert isinstance(cp, InMemorySaver)
|
|
|
|
def test_memory_singleton(self):
|
|
load_checkpointer_config_from_dict({"type": "memory"})
|
|
cp1 = get_checkpointer()
|
|
cp2 = get_checkpointer()
|
|
assert cp1 is cp2
|
|
|
|
def test_reset_clears_singleton(self):
|
|
load_checkpointer_config_from_dict({"type": "memory"})
|
|
cp1 = get_checkpointer()
|
|
reset_checkpointer()
|
|
cp2 = get_checkpointer()
|
|
assert cp1 is not cp2
|
|
|
|
def test_sqlite_raises_when_package_missing(self):
|
|
load_checkpointer_config_from_dict({"type": "sqlite", "connection_string": "/tmp/test.db"})
|
|
with patch.dict(sys.modules, {"langgraph.checkpoint.sqlite": None}):
|
|
reset_checkpointer()
|
|
with pytest.raises(ImportError, match="langgraph-checkpoint-sqlite"):
|
|
get_checkpointer()
|
|
|
|
def test_postgres_raises_when_package_missing(self):
|
|
load_checkpointer_config_from_dict({"type": "postgres", "connection_string": "postgresql://localhost/db"})
|
|
with patch.dict(sys.modules, {"langgraph.checkpoint.postgres": None}):
|
|
reset_checkpointer()
|
|
with pytest.raises(ImportError, match="langgraph-checkpoint-postgres"):
|
|
get_checkpointer()
|
|
|
|
def test_postgres_raises_when_connection_string_missing(self):
|
|
load_checkpointer_config_from_dict({"type": "postgres"})
|
|
mock_saver = MagicMock()
|
|
mock_module = MagicMock()
|
|
mock_module.PostgresSaver = mock_saver
|
|
with patch.dict(sys.modules, {"langgraph.checkpoint.postgres": mock_module}):
|
|
reset_checkpointer()
|
|
with pytest.raises(ValueError, match="connection_string is required"):
|
|
get_checkpointer()
|
|
|
|
def test_sqlite_creates_saver(self):
|
|
"""SQLite checkpointer is created when package is available."""
|
|
load_checkpointer_config_from_dict({"type": "sqlite", "connection_string": "/tmp/test.db"})
|
|
|
|
mock_saver_instance = MagicMock()
|
|
mock_cm = MagicMock()
|
|
mock_cm.__enter__ = MagicMock(return_value=mock_saver_instance)
|
|
mock_cm.__exit__ = MagicMock(return_value=False)
|
|
|
|
mock_saver_cls = MagicMock()
|
|
mock_saver_cls.from_conn_string = MagicMock(return_value=mock_cm)
|
|
|
|
mock_module = MagicMock()
|
|
mock_module.SqliteSaver = mock_saver_cls
|
|
|
|
with patch.dict(sys.modules, {"langgraph.checkpoint.sqlite": mock_module}):
|
|
reset_checkpointer()
|
|
cp = get_checkpointer()
|
|
|
|
assert cp is mock_saver_instance
|
|
mock_saver_cls.from_conn_string.assert_called_once()
|
|
mock_saver_instance.setup.assert_called_once()
|
|
|
|
def test_sqlite_creates_parent_dir(self):
|
|
"""Sync SQLite checkpointer should call ensure_sqlite_parent_dir before connecting.
|
|
|
|
This mirrors the async checkpointer's behaviour and prevents
|
|
'sqlite3.OperationalError: unable to open database file' when the
|
|
parent directory for the database file does not yet exist (e.g. when
|
|
using the harness package from an external virtualenv where the
|
|
.deer-flow directory has not been created).
|
|
"""
|
|
load_checkpointer_config_from_dict({"type": "sqlite", "connection_string": "relative/test.db"})
|
|
|
|
mock_saver_instance = MagicMock()
|
|
mock_cm = MagicMock()
|
|
mock_cm.__enter__ = MagicMock(return_value=mock_saver_instance)
|
|
mock_cm.__exit__ = MagicMock(return_value=False)
|
|
|
|
mock_saver_cls = MagicMock()
|
|
mock_saver_cls.from_conn_string = MagicMock(return_value=mock_cm)
|
|
|
|
mock_module = MagicMock()
|
|
mock_module.SqliteSaver = mock_saver_cls
|
|
|
|
with (
|
|
patch.dict(sys.modules, {"langgraph.checkpoint.sqlite": mock_module}),
|
|
patch("deerflow.agents.checkpointer.provider.ensure_sqlite_parent_dir") as mock_ensure,
|
|
patch(
|
|
"deerflow.agents.checkpointer.provider.resolve_sqlite_conn_str",
|
|
return_value="/tmp/resolved/relative/test.db",
|
|
),
|
|
):
|
|
reset_checkpointer()
|
|
cp = get_checkpointer()
|
|
|
|
assert cp is mock_saver_instance
|
|
mock_ensure.assert_called_once_with("/tmp/resolved/relative/test.db")
|
|
mock_saver_cls.from_conn_string.assert_called_once_with("/tmp/resolved/relative/test.db")
|
|
|
|
def test_sqlite_ensure_parent_dir_before_connect(self):
|
|
"""ensure_sqlite_parent_dir must be called before from_conn_string."""
|
|
load_checkpointer_config_from_dict({"type": "sqlite", "connection_string": "relative/test.db"})
|
|
|
|
call_order = []
|
|
|
|
mock_saver_instance = MagicMock()
|
|
mock_cm = MagicMock()
|
|
mock_cm.__enter__ = MagicMock(return_value=mock_saver_instance)
|
|
mock_cm.__exit__ = MagicMock(return_value=False)
|
|
|
|
mock_saver_cls = MagicMock()
|
|
mock_saver_cls.from_conn_string = MagicMock(side_effect=lambda *a, **kw: (call_order.append("connect"), mock_cm)[1])
|
|
|
|
mock_module = MagicMock()
|
|
mock_module.SqliteSaver = mock_saver_cls
|
|
|
|
def record_ensure(*a, **kw):
|
|
call_order.append("ensure")
|
|
|
|
with (
|
|
patch.dict(sys.modules, {"langgraph.checkpoint.sqlite": mock_module}),
|
|
patch(
|
|
"deerflow.agents.checkpointer.provider.ensure_sqlite_parent_dir",
|
|
side_effect=record_ensure,
|
|
),
|
|
patch(
|
|
"deerflow.agents.checkpointer.provider.resolve_sqlite_conn_str",
|
|
return_value="/tmp/resolved/relative/test.db",
|
|
),
|
|
):
|
|
reset_checkpointer()
|
|
get_checkpointer()
|
|
|
|
assert call_order == ["ensure", "connect"]
|
|
|
|
def test_postgres_creates_saver(self):
|
|
"""Postgres checkpointer is created when packages are available."""
|
|
load_checkpointer_config_from_dict({"type": "postgres", "connection_string": "postgresql://localhost/db"})
|
|
|
|
mock_saver_instance = MagicMock()
|
|
mock_cm = MagicMock()
|
|
mock_cm.__enter__ = MagicMock(return_value=mock_saver_instance)
|
|
mock_cm.__exit__ = MagicMock(return_value=False)
|
|
|
|
mock_saver_cls = MagicMock()
|
|
mock_saver_cls.from_conn_string = MagicMock(return_value=mock_cm)
|
|
|
|
mock_pg_module = MagicMock()
|
|
mock_pg_module.PostgresSaver = mock_saver_cls
|
|
|
|
with patch.dict(sys.modules, {"langgraph.checkpoint.postgres": mock_pg_module}):
|
|
reset_checkpointer()
|
|
cp = get_checkpointer()
|
|
|
|
assert cp is mock_saver_instance
|
|
mock_saver_cls.from_conn_string.assert_called_once_with("postgresql://localhost/db")
|
|
mock_saver_instance.setup.assert_called_once()
|
|
|
|
|
|
class TestAsyncCheckpointer:
|
|
@pytest.mark.anyio
|
|
async def test_sqlite_creates_parent_dir_via_to_thread(self):
|
|
"""Async SQLite setup should move mkdir off the event loop."""
|
|
from deerflow.agents.checkpointer.async_provider import make_checkpointer
|
|
|
|
mock_config = MagicMock()
|
|
mock_config.checkpointer = CheckpointerConfig(type="sqlite", connection_string="relative/test.db")
|
|
|
|
mock_saver = AsyncMock()
|
|
mock_cm = AsyncMock()
|
|
mock_cm.__aenter__.return_value = mock_saver
|
|
mock_cm.__aexit__.return_value = False
|
|
|
|
mock_saver_cls = MagicMock()
|
|
mock_saver_cls.from_conn_string.return_value = mock_cm
|
|
|
|
mock_module = MagicMock()
|
|
mock_module.AsyncSqliteSaver = mock_saver_cls
|
|
|
|
with (
|
|
patch("deerflow.agents.checkpointer.async_provider.get_app_config", return_value=mock_config),
|
|
patch.dict(sys.modules, {"langgraph.checkpoint.sqlite.aio": mock_module}),
|
|
patch("deerflow.agents.checkpointer.async_provider.asyncio.to_thread", new_callable=AsyncMock) as mock_to_thread,
|
|
patch(
|
|
"deerflow.agents.checkpointer.async_provider.resolve_sqlite_conn_str",
|
|
return_value="/tmp/resolved/test.db",
|
|
),
|
|
):
|
|
async with make_checkpointer() as saver:
|
|
assert saver is mock_saver
|
|
|
|
mock_to_thread.assert_awaited_once()
|
|
called_fn, called_path = mock_to_thread.await_args.args
|
|
assert called_fn.__name__ == "ensure_sqlite_parent_dir"
|
|
assert called_path == "/tmp/resolved/test.db"
|
|
mock_saver_cls.from_conn_string.assert_called_once_with("/tmp/resolved/test.db")
|
|
mock_saver.setup.assert_awaited_once()
|
|
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# app_config.py integration
|
|
# ---------------------------------------------------------------------------
|
|
|
|
|
|
class TestAppConfigLoadsCheckpointer:
|
|
def test_load_checkpointer_section(self):
|
|
"""load_checkpointer_config_from_dict populates the global config."""
|
|
set_checkpointer_config(None)
|
|
load_checkpointer_config_from_dict({"type": "memory"})
|
|
cfg = get_checkpointer_config()
|
|
assert cfg is not None
|
|
assert cfg.type == "memory"
|
|
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# DeerFlowClient falls back to config checkpointer
|
|
# ---------------------------------------------------------------------------
|
|
|
|
|
|
class TestClientCheckpointerFallback:
|
|
def test_client_uses_config_checkpointer_when_none_provided(self):
|
|
"""DeerFlowClient._ensure_agent falls back to get_checkpointer() when checkpointer=None."""
|
|
from langgraph.checkpoint.memory import InMemorySaver
|
|
|
|
from deerflow.client import DeerFlowClient
|
|
|
|
load_checkpointer_config_from_dict({"type": "memory"})
|
|
|
|
captured_kwargs = {}
|
|
|
|
def fake_create_agent(**kwargs):
|
|
captured_kwargs.update(kwargs)
|
|
return MagicMock()
|
|
|
|
model_mock = MagicMock()
|
|
config_mock = MagicMock()
|
|
config_mock.models = [model_mock]
|
|
config_mock.get_model_config.return_value = MagicMock(supports_vision=False)
|
|
config_mock.checkpointer = None
|
|
|
|
with (
|
|
patch("deerflow.client.get_app_config", return_value=config_mock),
|
|
patch("deerflow.client.create_agent", side_effect=fake_create_agent),
|
|
patch("deerflow.client.create_chat_model", return_value=MagicMock()),
|
|
patch("deerflow.client._build_middlewares", return_value=[]),
|
|
patch("deerflow.client.apply_prompt_template", return_value=""),
|
|
patch("deerflow.client.DeerFlowClient._get_tools", return_value=[]),
|
|
):
|
|
client = DeerFlowClient(checkpointer=None)
|
|
config = client._get_runnable_config("test-thread")
|
|
client._ensure_agent(config)
|
|
|
|
assert "checkpointer" in captured_kwargs
|
|
assert isinstance(captured_kwargs["checkpointer"], InMemorySaver)
|
|
|
|
def test_client_explicit_checkpointer_takes_precedence(self):
|
|
"""An explicitly provided checkpointer is used even when config checkpointer is set."""
|
|
from deerflow.client import DeerFlowClient
|
|
|
|
load_checkpointer_config_from_dict({"type": "memory"})
|
|
|
|
explicit_cp = MagicMock()
|
|
captured_kwargs = {}
|
|
|
|
def fake_create_agent(**kwargs):
|
|
captured_kwargs.update(kwargs)
|
|
return MagicMock()
|
|
|
|
model_mock = MagicMock()
|
|
config_mock = MagicMock()
|
|
config_mock.models = [model_mock]
|
|
config_mock.get_model_config.return_value = MagicMock(supports_vision=False)
|
|
config_mock.checkpointer = None
|
|
|
|
with (
|
|
patch("deerflow.client.get_app_config", return_value=config_mock),
|
|
patch("deerflow.client.create_agent", side_effect=fake_create_agent),
|
|
patch("deerflow.client.create_chat_model", return_value=MagicMock()),
|
|
patch("deerflow.client._build_middlewares", return_value=[]),
|
|
patch("deerflow.client.apply_prompt_template", return_value=""),
|
|
patch("deerflow.client.DeerFlowClient._get_tools", return_value=[]),
|
|
):
|
|
client = DeerFlowClient(checkpointer=explicit_cp)
|
|
config = client._get_runnable_config("test-thread")
|
|
client._ensure_agent(config)
|
|
|
|
assert captured_kwargs["checkpointer"] is explicit_cp
|